Fluidized bed reactor for gas phase olefin polymerization, process for polymerizing olefin and process for producing olefinic polymer
US6420498B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 2, 2000 |
| Grant date | Jul 16, 2002 |
| Priority date | — |
| Expiry date | May 2, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/92
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
There are provided:(1) a fluidized bed reactor for gas phase olefin polymerization, which has at least one drawing-out means for drawing out olefinic polymer powder within every zone of:(i) a zone (zone X) from a gas distribution plate to a height L1 satisfying the following formula (1); and(ii) another zone (zone Y) from a height L2 satisfying the following formula (2) to a powder level height of a fluidized bed,L1<0.1×D  (1)L2=0.1×D  (2)wherein L1 is a height from the gas distribution plate to an upper limit of said zone X; L2 is a height from the gas distribution plate to a lower limit of said zone Y; and D is the inside diameter of the fluidized bed reactor for gas phase polymerization, in which the olefinic polymer powder forms the fluidized bed,(2) a process for polymerizing olefin and(3) a process for producing an olefinic polymer, each of which processes comprises the steps of:(i) polymerizing an olefin in the aforesaid reactor; and(ii) drawing out the produced olefinic polymer powder through the aforesaid drawing-out means for drawing out the olefinic polymer powder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.